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Nechelyustovite (Nechelyustovit)

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Nechelyustovit
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Nechelyustovit
schmutzigweiße Massen von Nechelyustovit, Kirovsky Mine, Kukisvumchorr, Chibiny, Kola, Russland; BB ~ 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Kukisvumchorr/Kirovsky Mine (Kirovskii Apatit Mine, Kirov)
Mineral: Nechelyustovite
Image: 1581360193
License: Usage for Mineralienatlas project only
Nechelyustovit

schmutzigweiße Massen von Nechelyustovit, Kirovsky Mine, Kukisvumchorr, Chibiny, Kola, Russland; BB 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-10
Locality: Kirovsky Mine (Kirovskii Apatit Mine, Kirov) / Kukisvumchorr / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color cremefarben
Lustre Glasglanz, Perlglanz
Hardness (Mohs) 3
Cleavages vollkommen (001), mittelmäßig (100)
Fracture uneben
Crystal System monoklin, P2/m

Chemism

Chemical formula

Na4Ba2Mn1.5☐2.5Ti5Nb(Si2O7)4O4(OH)3F(H2O)6

Additional chem. information

Formel lt. CNMNC (Juni 2013): (Ba,Sr,K)2(Na,Ti,Mn)4(Ti,Nb)2O2Si4O14(O,H2O,F)2·4.5H2O

Chemical composition

Barium, Mangan, Natrium, Niob, Silicium, Titan, Fluor, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 1696.041915925 u; Number of atoms in the formula: 81

Info

Empirical formula:

Na4Ba2Mn1.5Vc2.5Ti5Nb(Si2O7)4O4(OH)3F(H2O)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Vacancy

Vc

0.00

2.5

3.09

0.0000000

0.0000000
Hydrogen

H

0.89

15

18.52

1.0079470

15.1192050
Oxygen

O

38.68

41

50.62

15.9994300

655.9766300
Fluorine

F

1.12

1

1.23

18.9984033

18.9984033
Sodium

Na

5.42

4

4.94

22.9897702

91.9590808
Silicon

Si

13.25

8

9.88

28.0855300

224.6842400
Titanium

Ti

14.11

5

6.17

47.8671000

239.3355000
Manganese

Mn

4.86

1.5

1.85

54.9380499

82.4070749
Niobium

Nb

5.48

1

1.23

92.9063820

92.9063820
Barium

Ba

16.19

2

2.47

137.3277000

274.6554000

Analysis wt%

SiO2 : 28.94, Nb2O5 : 11.43, TiO2 : 19.85, Al2O3 : 0.11, Fe2O3 : 0.27, MnO : 6.12, CaO : 1.55, SrO : 3.11, BaO : 11.80, Na2O : 7.85, K2O : 0.84, F : 1.21, H2O : 8.08 (Ref: Mineralogical Magazine 2009)

Strunz 9th edition incl. updates

9.BE.55

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
55:Bafertisit-Gruppe

Lapis Classification

VIII/C.15-060

VIII: SILIKATE
C: Gruppensilikate
15: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F); Bafertisit-Reihe

Classification by Hölzel

9.BH.305

9: SILICATES
B: Sorosilicates
H: Rosenbuschite-Lamprophyllite-Group

IMA status

anerkannt 2006

Mineral status

anerkanntes Mineral

Optical Properties

Color

cremefarben

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz, Perlglanz

max. Birefringence

0.034
Birefringence chart\! Nechelyustovite title=Birefringence chart Nechelyustovite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.700

RI value β

1.710

RI value γ / ε

1.734

Ri mean

1.415

2V angle

Biaxial (+) 66° (gemessen)

Orientation

X ~ c, Y ~ a, Z ~ b

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

10

Space Group

P2/m

Cell parameters a (Å)

5.447

Cell parameters b (Å)

7.157

Cell parameters c (Å)

47.259

Cell parameters a/b or c/a

0.761

Cell parameters c/b

6.603

Cell parameters α

95.77°

Cell parameters β

92.13°

Cell parameters γ

89.98°

Z

2

Volumne (ų)

1841.08

X-Ray Powder Diffraction

24.06(100), 7.05(9), 5.95(97), 3.95(6), 2.828(16), 2.712(19), 2.155(13)
XRD chart Nechelyustovite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.4 (gemessen) 3.22 (berechnet)

3.059 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (001), mittelmäßig (100)

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Kukisvumchorr

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Kukisvumchorr/Kirovsky Mine (Kirovskii Apatit Mine, Kirov)

Preface

Author (Name, Year)

Ferraris

References

F. Cámara1, E. Sokolova - From structure topology to chemical composition. X. Titanium silicates: the crystal structure and crystal chemistry of nechelyustovite, a group III Ti-disilicate mineral - Mineralogical Magazine 73 (2009) 753-775

European Journal of Mineralogy 21 (2009), 251

Other languages

German

Nechelyustovit

English

Nechelyustovite

Russian

Нечелюстовит

CNMNC (IMA)-Number

IMA 2006-021

CNMNC symbol

Symbol

Nec

Locations with GPS information